germany
What is COI/DOI? It’s just address validation and permission verification — you send a welcome or verification message and the recipient has to click on a link to prove they want the subscription. And it’s not a new thing, here’s me talking about it on this very blog fifteen years ago.I consider the terms “double opt-in” and “confirmed opt-in” are interchangeable. I find that most of the time, internet security and anti-spam folks call it COI, and marketers and some deliverability folks (like me!) call it DOI. When doing so, they refer to the same process of requiring an active response to the initial welcome or verification email.There are a lot of good reasons to implement COI/DOI, but today’s specific question is — does Germany “require” it? Ultimately this is a legal question, and I’m not a lawyer, so I’m not qualified to answer legal questions. So this is not legal…